degrow

To become smaller; to shrink.

They can eat vast amounts when times are good, and can even ‘degrow’ when food is scarce, consuming their own body mass very slowly, with no ill-effects.

Essentially, this meant that the markets were expecting the company to degrow and its economic performance to deteriorate.

To make (something) smaller, to reduce.

It seems likely that wealthy countries in Western Europe and North America need to degrow their economies before establishing a steady state.